President Barack Obama is officially sworn-in by Chief Justice John Roberts in the Blue Room of the White House during the 57th Presidential Inauguration in Washington, Sunday, Jan. 20, 2013. (AP Photo/Brendan Smialowski, Pool)

President Barack Obama is officially sworn-in by Chief Justice John Roberts in the Blue Room of the White House during the 57th Presidential Inauguration in Washington, Sunday, Jan. 20, 2013. (AP Photo/Brendan

President Obama takes the oath of office at the official swearing-in ceremony in the Blue Room of the White House Sunday, Jan. 20, 2013. Holding the Bible is first lady Michele Obama. (AP Photo/Doug Mills, The New York Times, Pool)

President Obama takes the oath of office at the official swearing-in ceremony in the Blue Room of the White House Sunday, Jan. 20, 2013. Holding the Bible is first lady Michele Obama. (AP Photo/Doug Mills,

Sen. Charles Schumer (D-N.Y.), who will make opening remarks and introduce participants on Inauguration Day, in the staircase of the Capitol Dome, in Washington, Jan. 18, 2013. Officials expect 600,000 to 800,000 people to turn out at the National Mall to witness Monday's Inauguration Day in Washington, typical for most inaugurations but far short of the 1.8 million who clogged the city in 2009. (Fred R. Conrad/The New York Times)

Sen. Charles Schumer (D-N.Y.), who will make opening remarks and introduce participants on Inauguration Day, in the staircase of the Capitol Dome, in Washington, Jan. 18, 2013. Officials expect 600,000 to

WASHINGTON — It's a good thing President Barack Obama considers himself a congenital optimist.

There are no easy "gets" as he scrolls through his second-term to-do list and looks ahead to the uncertainties of the next four years. Many of the items already on his agenda aren't there of his own choosing.

First up is certain battle with Congress in the next few months over deadlines on automatic budget cuts, expiring government spending authority and raising the debt limit. House Republicans last week agreed to bump up the debt limit slightly, but that just puts off that part of the fight for a few months.

Obama's goal is to get through that trifecta and still have the political capital left for the things he'd rather focus on: reducing gun violence, overhauling immigration policy, revamping tax laws, addressing climate change and more.

The president also will have to devote significant energy simply to safeguarding the achievements of his first term, by keeping the economic recovery alive, making sure his health care law is properly put in place in the face of persisting objections from businesses and individuals, and ensuring new financial regulations have teeth.

International worries, including the civil war in Syria, Iran's nuclear intentions and instability in Mali could complicate the president's second term game plan as well.

Plouffe argued that the president's big agenda gives him "the sort of focus and energy you need. And I think his intention is to run through the tape all the way."

Obama can take heart from any number of things he's got going for him. He has a can-do attitude, growing public support for action on some of his chosen issues and better approval ratings.

Democrats gained seats in both houses of Congress in the November election, and Republican poll numbers are weak. With the war in Iraq over and U.S. military involvement in Afghanistan winding down, he has more time to focus on domestic priorities. He also doesn't have to worry as much about ruffling feathers because he doesn't have to run for re-election again.

"People shouldn't underestimate how much we can get done," the president said in a pre-election interview for Rolling Stone.

Obama also understands the underwhelming track record of second-term presidents and the dangers of overreaching. "We are very cautious about that," he said.

The president hopes to strike a hopeful theme in his second inaugural address on Monday. But he knows that partisanship only worsened during his first term.

Immigration offers Obama perhaps his best chance at a significant second-term achievement. The 2012 elections, in which Obama drew lopsided support from Hispanics, gave Republicans a wake-up call on their need to pay more attention to Latinos, so the GOP is more inclined to work with the president there than on other issues.

The problem is incredibly complex, though, and past efforts at comprehensive change have failed. The question of how to deal with the estimated 11 million people already illegally in the U.S. is the big sticking point.

On gun control, an issue where Obama moved quickly after the Connecticut elementary school shooting, the president faces longer odds in Congress, and he knows that.

He promised to "put everything I've got" into the effort. But he also put people on notice that the effort will only succeed "if the American people demand it." That reflects his growing recognition that the only way to make an end run around Washington gridlock is by leveraging public will.

The polling on guns, then, may offer clues to what elements of the president's package have the best chances of enactment.

More than 80 percent of adults back setting a federal standard for background checks on people buying guns at gun shows. By comparison, 55 percent favor a nationwide ban on military-style, rapid-fire guns. That prohibition appears to have few chances of passing Congress.

Obama is sure to tangle with Congress again over spending and taxes as legislators grapple with the next three installments in the continuing "fiscal cliff" drama.

And that will roll right into the broader struggle over tax changes and setting the country on a more sustainable fiscal path, where Obama will have to seek consensus with a Republican-dominated House in which conservatives hold sway and moderates are no longer an endangered species but truly gone, Thurber says.

The president hopes for a "grand bargain" that reduces the deficit over the long term, but the trick is to achieve that goal while safeguarding Medicare, Medicaid and Social Security for future generations. A package that does both would go a long way toward expanding the legacy Obama began to build in his first term with action on health care and rescuing the economy.

The president enters his second with a new team taking shape and new strategies to deploy, but also more aware of the challenges inherent in the current atmosphere of polarization.

"What I don't think he's done is learn how to wield the power of the presidency in ways that former presidents have," says Jillson. "It's possible that Washington is just too different, and that what was possible for FDR or Lyndon Johnson is simply not possible today, even in light of large Democratic majorities in 2009-2010. Maybe Washington is just a different place."